Most Rhino materials plain white

Hi everyone, so I checked my folders in AppData and I have the materials in the Render Content folders, all in Rmtl file. But as you can see in the pic they dont work when I apply them, only some do as you can see at the base of the object. I tried importing the selected one by pressing Import from material Library but it stays the same.

What could possibly be the cause for this?

It appears the material properties themselves are coming through as I see different values represented for reflection for instance but my guess is the issue lies with the folder containing the diffuse/albedo maps for these materials.

Can you please go to edit one of these materials and see what is listed in the Diffuse slot (if anything)